Maunaloa News

 

The Hawaiian Volcano Observatory (HVO) reported that a small seismic swarm is occurring beneath the summit of the volcano.

At about 02:00 local time starting on 23 September, the seismic network recorded over 38 earthquakes beneath the summit caldera region with most earthquakes in a cluster about 3.1 mi (5 km) wide and -1.2 to 0.6 mi (-2 to 1 km) below the surface. These earthquakes may result from changes in the magma storage system and/or may be part of normal re-adjustments of the volcano due to changing stresses within it.

According to HVO Scientist-in-Charge Ken Hon, "Seismic activity beneath Mauna Loa has been gradually increasing over the past two months. Small earthquake swarms are considered a normal part of this increase in activity. Currently, there are no indications that magma is moving toward the surface and other monitoring systems are displaying normal behavior. Levels of seismicity and deformation remain below those recorded during the winter of 2021."

Source: Hawaiian Volcano Observatory volcano activity update 25 September 2022

Update 10/7:

The elevated seismic unrest at the volcano continues.
HVO seismic instruments registered during the past 24 hours approx. 44 earthquake events with magnitude less than M 3.0, located below the summit area and upper flanks of the volcano. The most of quakes occurred at shallow levels at depth less than 15 kilometers.
The local GPS network detected a continuing ground uplift in the volcano's summit region. This is likely reflecting continued magma intrusion and migration under the surface. Tiltmeters at the summit haven't shown any significant changes over the last 24 hours so far.
All monitoring gas emissions (SO2, CO2, H2S, fumaroles) remain at stable levels either at the summit or Sulphur Cone on the upper Southwest Rift Zone.
Source: Hawaiian Volcano Observatory volcano activity update 7 October 2022